My school district needs a address/phone number/ for our PO billing.

We probably not order until July or August with funds for 2013-14 school year. Will the price continue to be the same at $47.88?
They also request an address, phone number for their records even when they are paying with a credit card. Is this going to be a problem?
Do appreciate your response to our questions.
Thank you-- L Martin Title 1 Calhoun R-VIII School, Calhoun, MO